Patent · US Expired

Apparatus for perforating and testing the permeability of running webs of cigarette paper or the like

US4537206A · kind A · utility

7Cited by

7References

12Claims

0Family size

Assignee

Hauni-Werke Korber & Co. K.G. · DE

Inventors

Heinz-Christen Lorenzen · Bargteheide, DE
Uwe Heitmann · Hamburg, DE
Kurt-Eckart Petersen · Bargteheide, DE
Peter Pinck · Bargteheide, DE

Key dates

Filing date	Sep 27, 1982
Grant date	Aug 27, 1985
Priority date	—
Expiry date	Sep 27, 2002

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB26F1/00
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A running web of cigarette paper or the like is perforated in a first portion of its path, thereupon tested for permeability by a pneumatic detector in a second portion of the path, and finally tested for permeability by an optical detector in a third portion of the path. Signals which are generated as a result of pneumatic testing are used to adjust the perforating unit in the first portion of the path. Signals which are generated as a result of testing by the optical detector are compared with a reference signal denoting the desired permeability of the web, and the web and perforating unit are arrested, or the cigarettes which contain defective portions of the web are segregated from satisfactory cigarettes, if the deviation of generated signals from the reference signal exceeds a threshold value.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.